Logging apparatus



Dec. 16, 1924. 1,519,488 J. H. DICKINSON ET AL Locum APPARATUS Original Filed May 21 1920 Q WITNESS.- INVENTORS ATTORINEYS Patented Dec. id, 1324-.

earner Fries.

JOSEPH H. DICKINSON, 0E IMONTCLAIR, AND ERVIN D. S'W'AN. OF EAST ORANGE, NEW JERSEY.

- LOGGING APPARATUS.

Application filed May 21, 1920, Serial No. 383,066. Renewed November 7, 1924.

To all whom it iii/(Ly concern Be it known that Josnru H. DICKIN- soN and ERVIN D. Swim, citizens of the llnited States, and residents of Montclair, in the county of Essex and State of New Jersey, and East ()range, in the county of Essex and cltate of New Jersey, respectively, have invented certain new and useful Improvements in Logging Apparatus, of which the. following is a specification.

()ne object of our invention is the provision of a logging apparatus comprising a boom formed that when the sheaves are attached thereto, the ropes or cables may directly from the drums to the sheaveblocks without the provision of deflecting sheaves and the ropes can go straight to the woods without fouling the boom.

Other objects of our invention will appear in the specification and will be particularly pointed out in the claims.

Fig. 1 is a side view illustrating a car and part of an adjacent car, and the logging apparatus mounted on the car; Fig. 2 is a plan view of a portion oi? Fig. 3, and Figs. 3 and *l are a side view and a plan view, respectively, illustrating one 01 the slidable boom feet and the guides tor the same.

Referring, now, to the drawings, indicates a logging apparatus mounted on a car. or vehicle 11 provided with a bed frame or deck 12. The frame is mounted on one or more four-wheel trucks 13, two such trucks being shown.

The car or vehicle is propelled by an engine mounted beneath the bed frame 12. The propelling engine is mounted on a frame 17 supported from beneath the frame.

The logging apparatus, which is illustrated in Figs. 1 and 2, comprises, as already indicated, a skidding engine, indicated in general at 10, Which actuates drums, which we have indicated in general by the character :56, and which need not be specifically described, as the specific arrangement thereof constitutes no part of our present invention. This apparatus comprises a boom having an A-shaped part, as indicated at 37, and a short extension, as indicated at 38, to the sides of which extension are swingingly at tached the sheaves-blocks 39, over which pass the various ropes or cables required in the skidding operations. While our present invention is not concerned with the number or function of the cables, it may be noted that,

in the form of our invention here illustrated, ll) is the out-haul rope or cable, 4:1 the skidding or in-haul rope, 4&2 the rope for changing lines and decking logs, and $3 the guy ropes. r supporting cable for the boom is indicated at 4: 1. It may be noted that the rope leads are centered oil the side or the boom and that the skidding engine is of the duplex type, with drums arranged on either side of the center. By making the boom in the described manner, a bend 0r depression is formed in the boom between the A-shaped part and the extension, as best shown in Fig. 2. With the sheave-blocks arranged on the sides of the extension, it will be apparent that the various ropes may pass from the drums to their sheaves without the intervention of deflecting sheaves oi the character that are commonly required, and tha the ropes from the sheaves to the woods will not 'loul the boom. I

By providing a projection extending beyond the A-shaped part or the boom, and mounting the sheaves ou the sides thereof. then with the winding drums located at the rear of the boom, as they are usually arranged, the portions of the cables extending from the drums to the sheaves lie in vertical planes that are substantially parallel with the longitudinal axis of the engine, as will be apparent from Fig. 4t, and with the parts so arranged, there is a minimum tendency for the cables extending from the drums to the sheaves to foul the A-shaped part of the boom, for the cables, as they leave the boom, come at the bend formed between the A- shaped part and the projection, as illustrated in Fig. 3, and where there is little tendency to foul the A-shaped part. Furthermore, there is no tendency to toul the projecting part oi the boom on which the sheaves are mounted. The provision of this projection makes it possible, as stated, to bring the cables from the sheaves to the drums in planes si'ibstantially parallel to the longitudinal axis of the engine, thereby bringing the cables out away from the projection. This arrangement is particularly applicable to groundskidding apparatus such as illustrated in the drawings, though it will, of course, be understood that the invention is not limited to this particular application. as it will be evident that it is equally applicable, for example, to overhead-skidding apparatus.

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The feet 45 of the two legs 37 of the boom slidably engage base plates 46 on the bed frame of the vehicle, which form guideways for the feet. Referring particularly to Figs. 5 and 6, the foot 45 comprises angle-irons 45* secured to a sliding plate 45*, which slides on the base-supporting plate 46. The longitudinal movement of the foot of the boom is limited by stop plates 47 and 48. The foot is preferably held to its seat by angle-irons 49 secured to guide plates 50, which are illustrated as angle-irons, It will be noted from Fig. 5 that a certain space between the foot of the boom and the guide plates 50 is provided, so that the same has a limited amount of lateral movement. Such sliding engagement permits the boom to swing under the strains to which the same is subjected and thus relieves the skidding car from the twisting strains to which it would otherwise be subjected.

While we have herein shown and described one modification of our invention, we do not desire to be limited to the exact arrangement shown and described, but seek to cover, in the appended ciailns, all those modifications which come within the true spirit and scope of our invention.

What we claim and desire to secure by Letters Patent 01"? the United States is:

1. A logging apparatus comprising a boom having an A-shaped part and a projection extending beyond the tip of the A and forming an angle therewith, winding drums at the rear of the base of the boom, a plurality of sheave-blocks attached to the side of said projection, and cables wound on said drums and passing overthe sheaves of said sheave-blocks.

2. A logging apparatus comprising a boom having an A-shaped part and a pro jection extending beyond the tip of the A and forming an angle therewith, engines having winding drums at the rear of the base of the boom, aplurality of sheaveblocks attached to the side of said projection, and cables Wound on said drums and passing over the sheaves of said sheaveblocks, the apparatus being constructed and arranged to bring said cables in a vertical plane substantially parallel to the longitudinal axis of the engine.

3. In a ground-skidding apparatus, a boom having an A-shaped part and a projection extending beyond the tip of the A and forming an angle therewith, winding drums at the rear of the base of the boom, sheave-blocks attached to the side of said projection, cables wound on said drum and passing over the sheaves of said sheaveblocks.

JOSEPH H. DICKINSON ERVIN D. SlVAN.

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